I have above mentioned record on the top of my Dashboard. However I can see the dashboard itself. I use IE 8.0.6001.18702. A couple of times, while trying to open Spiceworks I got the message about how IE 6.0 is old and my session was terminated.

Try wiping cache/cookies before digging any deeper - sometimes this happens with IE and wiping the cache/cookies may be all that is necessary. Especially since you aren't having problems with 5.0 in IE8.